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$130+ Cheap flights from Ontario to Billings (ONT - BIL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Ontario to Billings

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Billings (BIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$255
(United Airlines)

One-way from

$130
(Alaska Airlines)

Popular in

March

Cheapest in

January

Average price

$322
From Ontario to Billings Logan Intl
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One-way flight from Ontario to Billings Logan Intl
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Highest demand for flights based on searches. 21% potential increase in price ($106 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Billings

Cheapest flights from Ontario to Billings
Explore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:00 amONT - BIL
1 stop26h 08mMultiple Airlines
Mon 9/298:40 pmBIL - ONT
1 stop26h 16mMultiple Airlines
Deal found 9/15$210
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/259:16 amONT - BIL
1 stop22h 52mMultiple Airlines
Wed 10/112:11 pmBIL - ONT
2 stops24h 27mMultiple Airlines
Deal found 9/15$250
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:05 amONT - BIL
1 stop7h 13mUnited Airlines
Wed 10/222:30 pmBIL - ONT
1 stop6h 54mUnited Airlines
Deal found 9/15$255
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:35 pmONT - BIL
1 stop4h 50mDelta
Wed 10/226:15 pmBIL - ONT
1 stop6h 24mDelta
Deal found 9/16$261
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/259:16 amONT - BIL
1 stop22h 52mMultiple Airlines
Fri 9/265:21 pmBIL - ONT
2 stops27h 33mMultiple Airlines
Deal found 9/15$262
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:53 pmONT - BIL
2 stops7h 53mUnited Airlines
Wed 10/227:00 amBIL - ONT
1 stop6h 51mUnited Airlines
Deal found 9/16$266
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:43 pmONT - BIL
1 stop18h 21mAlaska Airlines
Wed 10/221:59 pmBIL - ONT
1 stop5h 34mAlaska Airlines
Deal found 9/14$295
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:00 amONT - BIL
1 stop4h 04mDelta
Sat 10/256:15 pmBIL - ONT
1 stop4h 05mDelta
Deal found 9/15$313
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/15:05 amONT - BIL
1 stop7h 13mUnited Airlines
Wed 10/12:30 pmBIL - ONT
1 stop6h 54mUnited Airlines
Deal found 9/15$315

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Billings that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.

Fly from

Ontario

Fly to

Billings

Route

Depart

Return

Price

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 10/22

5:05 am-1:18 pm

1 stop7h 13m

Billings Logan Intl

Wed 10/22

2:30 pm-8:24 pm

1 stop6h 54m

$255

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 10/15

4:35 pm-10:25 pm

1 stop4h 50m

Billings Logan Intl

Wed 10/22

6:15 pm-11:39 pm

1 stop6h 24m

$261

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 10/15

1:53 pm-10:46 pm

2 stops7h 53m

Billings Logan Intl

Wed 10/22

7:00 am-12:51 pm

1 stop6h 51m

$266

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 10/20

7:43 pm-3:04 pm

1 stop18h 21m

Billings Logan Intl

Wed 10/22

1:59 pm-6:33 pm

1 stop5h 34m

$295

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 10/25

6:00 am-11:04 am

1 stop4h 04m

Billings Logan Intl

Sat 10/25

6:15 pm-9:20 pm

1 stop4h 05m

$313

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 10/1

5:05 am-1:18 pm

1 stop7h 13m

Billings Logan Intl

Wed 10/1

2:30 pm-8:24 pm

1 stop6h 54m

$315

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 9/30

4:40 pm-10:35 pm

1 stop4h 55m

Billings Logan Intl

Wed 10/1

5:25 am-8:58 am

1 stop4h 33m

$321

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 10/1

6:00 am-10:53 am

1 stop3h 53m

Billings Logan Intl

Wed 10/1

6:19 pm-11:42 pm

1 stop6h 23m

$321

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 9/29

6:00 am-7:50 pm

1 stop12h 50m

Billings Logan Intl

Wed 10/1

12:11 pm-11:38 am

2 stops24h 27m

$335

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 9/29

4:40 pm-10:35 pm

1 stop4h 55m

Billings Logan Intl

Wed 10/1

5:25 am-8:58 am

1 stop4h 33m

$346

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 19 results
1
2

Best time to book a flight from Ontario to Billings

Have a flexible travel schedule? Discover the best time to fly to Billings from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Billings

What is the cheapest month to book a flight from Ontario to Billings?

Currently, January is the cheapest month in which you can book a flight from Ontario to Billings (average of $395). Flying from Ontario to Billings in June is currently the most expensive (average of $509). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to BIL?

Find hourly flight availability from Ontario to Billings. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

One of the essential ways to save on airfare from Ontario to Billings is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 31% on airfare.

Reviews of airlines servicing Billings

Get insights into the airlines that provide service to Billings. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Billings. Reviews last updated September 16, 2025.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Billings?

    Departing from Ontario to Billings will take you 4h 50m. The distance from Ontario to Billings is about 941 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Ontario to Billings round-trip?

    Currently priced at $245, Delta will fly you from Ontario to Billings and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Alaska Airlines - these airlines can fly you to your destination from $270 and $284, respectively. Delta is currently priced 37% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Ontario to Billings one-way?

    The cheapest airlines for a one-way flight from Ontario to Billings are Alaska Airlines ($130), United Airlines ($131), and Delta ($167).

  • Can I find deals for flights from Ontario to Billings that include hotel bookings?

    Yes. In addition to deals on Ontario to Billings flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Billings?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Billings.

  • Can I find deals for business class flights from Ontario to Billings?

    Yes. Cheapflights offers flight deals from Ontario to Billings by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Billings?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Billings (average of $395). Flying from Ontario to Billings in June is currently the most expensive (average of $509). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from Ontario to Billings

Discover the top 3 airlines that operate flights from Ontario to Billings. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$245Average$321FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$270Average$501FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$284Average$322FlexibilityNo cancel feeOn-time75%

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